int pthread_mutex_take(FAR struct pthread_mutex_s *mutex, bool intr)
{
int ret = EINVAL;
/* Verify input parameters */
DEBUGASSERT(mutex != NULL);
if (mutex != NULL) {
/* Make sure that no unexpected context switches occur */
sched_lock();
/* Error out if the mutex is already in an inconsistent state. */
if ((mutex->flags & _PTHREAD_MFLAGS_INCONSISTENT) != 0) {
ret = EOWNERDEAD;
} else {
/* Take semaphore underlying the mutex. pthread_sem_take
* returns zero on success and a positive errno value on failure.
*/
ret = pthread_sem_take(&mutex->sem, intr);
if (ret == OK) {
/* Check if the holder of the mutex has terminated without
* releasing. In that case, the state of the mutex is
* inconsistent and we return EOWNERDEAD.
*/
if ((mutex->flags & _PTHREAD_MFLAGS_INCONSISTENT) != 0) {
ret = EOWNERDEAD;
}
/* Add the mutex to the list of mutexes held by this task */
else {
pthread_mutex_add(mutex);
}
}
}
sched_unlock();
}
return ret;
}
static void tc_pthread_pthread_sem_take_give(void)
{
int ret_chk;
int get_value;
sem_t sem;
sem_init(&sem, 0, VAL_THREE);
ret_chk = pthread_sem_take(&sem, false);
TC_ASSERT_EQ("pthread_sem_take", ret_chk, OK);
sem_getvalue(&sem, &get_value);
TC_ASSERT_EQ("sem_getvalue", get_value, VAL_TWO);
ret_chk = pthread_sem_give(&sem);
TC_ASSERT_EQ("pthread_sem_give", ret_chk, OK);
sem_getvalue(&sem, &get_value);
TC_ASSERT_EQ("sem_getvalue", get_value, VAL_THREE);
TC_SUCCESS_RESULT();
}